EE4PM4_Lab4_2023

pdf

School

McMaster University *

*We aren’t endorsed by this school

Course

4PM4

Subject

Electrical Engineering

Date

Jan 9, 2024

Type

pdf

Pages

Uploaded by ColonelGrousePerson362

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 1 ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems Lab #4 Fault Studies Due date: Dec. 6, 2023 (before 11:59PM) Please upload lab report on Avenue to Learn: Assessments > Assignments > Lab4

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 2 Student name: Student ID: Lab No.: Student course number: Mark (%): Objectives • Understanding the faulty behavior of power system in Power World Simulator. • Observe the effect of different faults on bus voltage. • Observe the contribution of fault current at each bus. • Observe the fault current without considering the specified power elements like transmission line and generator. Procedure (10 marks for observed data and screen captures in each question, total 60 marks) Fig. 1 shows a single-line diagram of a five-bus power system. Input data are given in Tables 1 and 2. As shown in Fig. 1, bus 1 is the slack bus. Bus 3 is a voltage-controlled bus. Bus 2 is load bus. Slack G1 15 kv P base = 100 MVA Transformer 15/345 kV Transformer 345/15 kV 280 MVAR 800 MW 520 MW Bus 1 Bus 5 Bus 4 Bus 3 Bus 2 Figure 1 Table 1: Line input data Bus to bus R X G B 2-4 0 0.1 0 0 2-5 0 0.05 0 0 4-5 0 0.025 0 0 Table 2: Transformer input data Bus to bus R X G B 1-5 0 0.02 0 0 3-4 0 0.01 0 0 1. Build Fig.1 in Power World Simulator, the model should be similar to Fig. 2 . Make sure you add the buses first with their given value of voltages, then add the rest of the network: transformers, generators, and transmission lines. Make sure that AVR for the slack generator only is checked on with a desired control voltage of 1.05 pu .

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 3 Figure 2: System model in simulator 2. To do fault analysis, Load is disconnected (as the fault path is zero impedance, so all the current will pass through the fault). 3. Fault consumes high current, which is due to the reactive power flow and not the real power. As a result, the real power value for both generators should be set to zero . 4. For each generator, transformer and transmission line (TL), edit the values of fault impedances as shown in Fig. 3.

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 4 Bus 1-5 Transformer Bus 3-4 Transformer Bus 4-5 TL Bus 2-5 TL Slack Generator Bus-3 Generator Bus 2-4 TL Figure. 3 Fault parameters for each unit.

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 5 5. To do a single line to ground fault at bus 2 , go to “Run Mode” as in lab 1, then click on “Fault Analysis” as in Fig. 4. Figure. 4 6. A new window will appear, on the left side select “ Single F ault” then click on “Bus Records” . Select bus 2 and “Single Line -to- Ground” as fault type as shown in Fig. 5 . And finally click on calculate to view system parameters at this faulty condition. Select bus Voltage magnitudes of each phase at each bus Voltage angles of each phase at each bus Fault Current Figure. 5 7. Now you should be able to solve the system at different kinds of faults and at different locations by following the same steps. 8. Solve the following problems with the help of PWS: a. Use Power World Simulator to determine the type of bus 2 fault that gives the highest per-unit voltage magnitude. (Overvoltage exists when bus voltage is higher than 1.05 pu)

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 6 Single Line-to-Ground Fault BUS Phase ‘a’ volt Phase ‘ b ’ volt Phase ‘ c ’ volt Phase ‘a’ Angle Phase ‘ b ’ Angle Phase ‘ c ’ Angle 1 2 3 4 5 Line-to-Line Fault: BUS Phase ‘a’ volt Phase ‘ b ’ volt Phase ‘ c ’ volt Phase ‘a’ Angle Phase ‘ b ’ Angle Phase ‘ c ’ Angle 1 2 3 4 5 3 Phase Balanced BUS Phase ‘a’ volt Phase ‘ b ’ volt Phase ‘ b ’ volt Phase ‘a’ Angle Phase ‘ b ’ Angle Phase ‘ c ’ Angle 1 2 3 4 5 Double Line-to-Ground Fault BUS Phase ‘a’ volt Phase ‘ b ’ volt Phase ‘ c ’ volt Phase ‘a’ Angle Phase ‘ b ’ Angle Phase ‘ c ’ Angle 1 2 3 4 5 b. Determine the fault current with a line-to-line fault at each of the buses. To view fault current, refer to Fig. 5. BUS I f Magnitude I f Scaled Magnitude I f Angle 1 2 3 4 5 c. Determine the fault current with a bolted double line-to-ground fault at each of the buses. BUS I f Magnitude I f Scaled Magnitude I f Angle 1 2 3 4 5 d. Re-determine 8.b fault currents, with a new line installed between buses 2 and 4. The parameters for this new line should be identical to those of the existing line between buses 2 and 4 in terms of reactance and fault information. Are the fault currents larger or smaller than the values determined in 8.b? BUS I f Magnitude I f Scaled Magnitude I f Angle 1 2 3 4 5

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version

Access to all documents
Unlimited textbook solutions
24/7 expert homework help

ELECENG 4PM4 / ECE 6PM4 Electrical Power Systems 7 e. Re-determine 8.b fault currents, with a second generator added at bus 3. The parameters for the new generator should be identical to those of the existing generator at bus 3. Check ON the AVR of both generators at bus 3 , so now all the three generators have AVR ON. Are the fault currents larger or smaller than the values determined in 8.b? BUS I f Magnitude I f Scaled Magnitude I f Angle 1 2 3 4 5 Discussion (40 marks – each component weighted equally) Based on all the results of above problems, present a comprehensive discussion on • Overvoltages and over currents impacted by type of faults. • Overvoltages and over currents impacted by addition of line. • Overvoltages and over currents impacted by addition of generator.